Question

Ques 16.18)

Estimate the electrical conductivity values for the materials shown in the table.Show appropriate units for conductivity.Which of these materials will serve as effective electrode material in Microfuel cell applications?Why?

MaterialResistivity (-cm)Conductivity

Carbon paper80 x10^-3

Carbon cloth11 x10^-3

Carbon foam10 x10^-3

RVC5 x10^-3

Graphite rods0.9 x10^-3

Answer 1

There is a relation between Resistivity and conductivity of materials which is given by

So

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So the highest conductivity materials is graphite rods with conductivity of 1111.11 S/m it will serve as effective electrode materials in Microfuel cell application. Because it will have very low resistance and very low losses.